Multiple diestock



MULTIPLE DIESTOCK Filed April 9, 1929 2 Sheets-sheer 1 Jan. 2l, 1930. w. v. BULMAN MULTIPLE DIESTOCK INVENTOR.

Filed April 9, 1929 Patented Jan. 21, 1930 UNITED STATES WILLIAM V. BULMAN, OF PHILADELPHIA, PENNSYLVANIA MULTIPLE DIESTOCK Application filed April 9, 1929.

rlhis invention is a novel improvement in multiple die-stocks and the principal object thereof is to provide a die-stock adapted to carry a plurality of divided dies of different sizes with their related guide bushings disposed diametrically opposite same; the diestock being designed for minimum length, and embodying certain novel features of construction whereby the dies may be disposed in 1o adjacent faces of the upper portion of the stock; and whereby all the dies will be readily accessible for oiling, cleaning, and inspection while in operation. My novel die-stock possesses the qualities of lightness and strength, also facility in operation.

I will explain the invention with reference to the accompanying drawings which illustrate one practical embodiment thereof to enable others to adopt and use the same; and

will summarize in the claims the novel features of construction, and novel combinations of parts, for which protection is desired.

In the drawings;

Fig. 1 is a side elevation of my novel diestock showing the divided dies mounted thereon.

Fig. 2 is top plan view of the stock.

Fig. 3 is an end elevation thereof.

Fig. 4 is a transverse section on the line 4 4 Fig. 1.

Fig. 5 is longitudinal section on the axis of the stock.

As shown, the die-stock preferably comprises a relatively short base 1, of cast iron or the like, and preferably of general U-shaped cross section, with the upwardly extending legs of the base flaring outwardly, the base being adapted to hold the guide bushings for the pipes which are being thre-aded. Each end of the lower portion of the base 1 is extended as at 2, and preferably formed integrally or otherwise secured to the parallel end plates 3 which are provided with aligned tubular projections 4 disposed substantially at the centers of the plates 3, the projections Serial No. 353,806.

l being tapped to receive the threaded ends of handle bars 5 by which the die-stock is manipulated in the usual manner.

Above each end of the base 1 is an upwardly arched head 6 preferably cast integrally with the upper ends of the legs of the base 1 and with the end plates 3, said heads 6 having opposed die carrying faces (three such faces being shown, i. e. 7, 8, 9) the corresponding faces of each head lying in the same plane. Heads 6 are spaced apart leaving a gap overlying the U-shaped base of the stock or over the solid portion of the base, the gap being of width to suit the dimensions of the maximum divided die which is to be used in im the stock. The gap as shown extends from lee' to leg of the base 1 across the entire upper portion of the stock.

Obviously the number of die carrying faces 7, 8, 9 of the opposed heads 6 could be increased or diminishedaccording to the number-of dies to be used in the stock, and within the limits of the span of base 1.

The opposed faces 7, 8, 9 of the heads 6 are provided with recesses 10 receiving their re spective halves of the standard divided dies 11, 12, 13, which are set flush with the outer surfaces of the faces 7, 8, 9, the cutting teeth of the dies extending into the opening between the heads 6 as shown. Dies 11, 12 and 75 13 are retained in the recesses 10 by means of bolts 14 passing through slots in the dies and into the body of the heads 6, in the usual manner.

I preferably arrange the largest die 12, so in the middle face 8 of the heads 6, and preferably the overall span of the faces 7, 8, 9, including the gap between the faces, is made the same as the overall length of this largest divided die 12 when the halves thereof are S5 properly spaced for cutting, in order to maintain a minimum length for the stoclr. The halves of the largest die 12 (which may be for cutting a 3A pipe) are adjusted towards or from each other, over the gap, by means of 00 i set screws 15 tapped through the heads 6 below the die 12 and at opposite sides of the bolt 14, said screws 15 engaging the shoulders 12 on the under sides of the halves of die 12. In this way the usual perforated lugs for I the set screws at the ends of the recesses 10 for with set screws 17 engaging the ends of the die members 11 and 13 for purpose of the adjustment in the usual manner.

Diametrically opposite each die 11, 12 and 13 on the transverse axis of the base 1 is an opening 18 receiving a related guide bushing 19, 2O or 21 respectively for the particular size pipe to be cut by its related die 11, 12 or 13. Bushings 19, 2O and 21 are preferably retained in their openings 1S by means of set screws 22.

The above construction and arrangement provides a multiple die-stock of minimum length and weight; and one in which all the dies 11, 12 and 13 may be placed in adjacent faces of the heads 6; also the gap between the heads 6 while reducing the weight ofthe stock permits ready inspection, cleaning and oiling-of any and all of the dies, while in operation; also the arrangement 0r the set screws 15 for the largest die 12 permits the stock to be made at least 11/2 inches shorter than stocks heretofore made for holding the same size die. My. stock possesses the qualities of lightness and strength; is inexpensive to manufacture; easy to operate; and the heads 6 and base 1 may readily be modified as desired for carrying any number of different size dies, also their related guides opposite.

I do not consider my invention restricted to the exact form shown in the drawings, for obviously changes may be made therein within the scope of the claims.

I claim:

1. A multiple die stock for sets of divided dies comprising a base having spaced heads on its upper side, separated by a gap extending across the major portion of the stock, each head having a plurality of die holding grooves in its upper surface adapted to each receive one member of the sets of dies, die members in said grooves having their teeth disposed in the gap between the heads; and said base'having a plurality of guide openings diametrically opposite the sets of dies.

2. A multiple die stock for sets of divided dies comprising a base having spaced heads vWILLIAM V. BULMAN. 

